* Re: [RFC PATCH v4 01/28] sched: Cache aware load-balancing
[not found] <9157186cf9e3fd541f62c637579ff736b3704c51.1754712565.git.tim.c.chen@linux.intel.com>
@ 2025-08-12 1:30 ` kernel test robot
2025-08-12 3:26 ` Chen, Yu C
0 siblings, 1 reply; 2+ messages in thread
From: kernel test robot @ 2025-08-12 1:30 UTC (permalink / raw)
To: Chen Yu
Cc: oe-lkp, lkp, linux-mm, linux-kernel, aubrey.li, yu.c.chen,
Peter Zijlstra, Ingo Molnar, K Prateek Nayak, Gautham R . Shenoy,
Vincent Guittot, Juri Lelli, Dietmar Eggemann, Steven Rostedt,
Ben Segall, Mel Gorman, Valentin Schneider, Libo Chen,
Madadi Vineeth Reddy, Hillf Danton, Shrikanth Hegde, Jianyong Wu,
Yangyu Chen, Tingyin Duan, Vern Hao, Len Brown, Tim Chen,
Aubrey Li, Zhao Liu, Chen Yu, oliver.sang
Hello,
kernel test robot noticed "Oops:general_protection_fault,probably_for_non-canonical_address#:#[##]SMP_KASAN" on:
commit: 2ae6ef14daceb295598846a328dd65fde6b16c99 ("[RFC PATCH v4 01/28] sched: Cache aware load-balancing")
url: https://github.com/intel-lab-lkp/linux/commits/Chen-Yu/sched-Cache-aware-load-balancing/20250809-131716
base: v6.16
patch link: https://lore.kernel.org/all/9157186cf9e3fd541f62c637579ff736b3704c51.1754712565.git.tim.c.chen@linux.intel.com/
patch subject: [RFC PATCH v4 01/28] sched: Cache aware load-balancing
in testcase: boot
config: x86_64-randconfig-103-20250810
compiler: gcc-12
test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G
(please refer to attached dmesg/kmsg for entire log/backtrace)
+----------------------------------------------------------------------------------+-------+------------+
| | v6.16 | 2ae6ef14da |
+----------------------------------------------------------------------------------+-------+------------+
| Oops:general_protection_fault,probably_for_non-canonical_address#:#[##]SMP_KASAN | 0 | 5 |
| KASAN:null-ptr-deref_in_range[#-#] | 0 | 5 |
| RIP:_find_next_bit | 0 | 5 |
| Kernel_panic-not_syncing:Fatal_exception | 0 | 5 |
+----------------------------------------------------------------------------------+-------+------------+
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <oliver.sang@intel.com>
| Closes: https://lore.kernel.org/oe-lkp/202508111054.58c525c-lkp@intel.com
[ 18.108061][ T1] usbcore: registered new interface driver i2c-diolan-u2c
[ 18.111512][ T36] input: AT Translated Set 2 keyboard as /devices/platform/i8042/serio0/input/input0
[ 18.113593][ T1] Driver for 1-wire Dallas network protocol.
[ 18.119966][ T1] f71882fg: Not a Fintek device
[ 18.120517][ T1] f71882fg: Not a Fintek device
[ 18.142462][ T63] Oops: general protection fault, probably for non-canonical address 0xdffffc0000000012: 0000 [#1] SMP KASAN
[ 18.144289][ T63] KASAN: null-ptr-deref in range [0x0000000000000090-0x0000000000000097]
[ 18.145594][ T63] CPU: 0 UID: 0 PID: 63 Comm: modprobe Not tainted 6.16.0-00001-g2ae6ef14dace #1 PREEMPT(none)
[ 18.146207][ T63] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[ 18.146207][ T63] RIP: 0010:_find_next_bit (kbuild/src/consumer/lib/find_bit.c:156 (discriminator 2))
[ 18.146207][ T63] Code: 48 89 d3 48 83 c8 ff 83 e2 3f 49 89 fe 48 c1 eb 06 c4 62 e9 f7 e8 b8 ff ff 37 00 4c 8d 3c df 48 c1 e0 2a 4c 89 fa 48 c1 ea 03 <80> 3c 02 00 74 08 4c 89 ff e8 cc 76 52 ff 49 8b 07 4c 21 e8 49 bd
All code
========
0: 48 89 d3 mov %rdx,%rbx
3: 48 83 c8 ff or $0xffffffffffffffff,%rax
7: 83 e2 3f and $0x3f,%edx
a: 49 89 fe mov %rdi,%r14
d: 48 c1 eb 06 shr $0x6,%rbx
11: c4 62 e9 f7 e8 shlx %rdx,%rax,%r13
16: b8 ff ff 37 00 mov $0x37ffff,%eax
1b: 4c 8d 3c df lea (%rdi,%rbx,8),%r15
1f: 48 c1 e0 2a shl $0x2a,%rax
23: 4c 89 fa mov %r15,%rdx
26: 48 c1 ea 03 shr $0x3,%rdx
2a:* 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction
2e: 74 08 je 0x38
30: 4c 89 ff mov %r15,%rdi
33: e8 cc 76 52 ff call 0xffffffffff527704
38: 49 8b 07 mov (%r15),%rax
3b: 4c 21 e8 and %r13,%rax
3e: 49 rex.WB
3f: bd .byte 0xbd
Code starting with the faulting instruction
===========================================
0: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1)
4: 74 08 je 0xe
6: 4c 89 ff mov %r15,%rdi
9: e8 cc 76 52 ff call 0xffffffffff5276da
e: 49 8b 07 mov (%r15),%rax
11: 4c 21 e8 and %r13,%rax
14: 49 rex.WB
15: bd .byte 0xbd
[ 18.146207][ T63] RSP: 0000:ffffc900001f7d28 EFLAGS: 00010206
[ 18.146207][ T63] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: fffffbfff0bdd81a
[ 18.146207][ T63] RDX: 0000000000000012 RSI: 0000000000000002 RDI: 0000000000000090
[ 18.146207][ T63] RBP: ffffc900001f7d50 R08: 0000000000000000 R09: 0000000000000003
[ 18.146207][ T63] R10: ffffffff8145362f R11: ffffed103099ffd5 R12: 0000000000000002
[ 18.146207][ T63] R13: ffffffffffffffff R14: 0000000000000090 R15: 0000000000000090
[ 18.146207][ T63] FS: 0000000000000000(0000) GS:ffff888428798000(0000) knlGS:0000000000000000
[ 18.146207][ T63] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033
[ 18.146207][ T63] CR2: 00000000f7fc18c8 CR3: 0000000185368000 CR4: 00000000000406b0
[ 18.146207][ T63] Call Trace:
[ 18.146207][ T63] <TASK>
[ 18.146207][ T63] task_cache_work (kbuild/src/consumer/include/linux/find.h:71 (discriminator 2) kbuild/src/consumer/kernel/sched/fair.c:1325 (discriminator 2))
[ 18.146207][ T63] ? _raw_spin_unlock_irq (kbuild/src/consumer/arch/x86/include/asm/paravirt.h:671 kbuild/src/consumer/include/linux/spinlock_api_smp.h:159 kbuild/src/consumer/kernel/locking/spinlock.c:202)
[ 18.146207][ T63] ? __pfx_task_cache_work (kbuild/src/consumer/kernel/sched/fair.c:1299)
[ 18.146207][ T63] ? __this_cpu_preempt_check (kbuild/src/consumer/lib/smp_processor_id.c:67)
The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20250811/202508111054.58c525c-lkp@intel.com
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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